This picture was taken from here where there is a nice description of the L-1011-500 features.
I was talking with Ramin , a former Grant student now at UCB, about the L-1011 project I spent about 13 years on. The last few years I spent as principal engineer on one of the neat systems called the Active Control System that was used to alleviate loads on an extended wing tip of the L-1011-500. I found some links to people that are still interested in the L-1011 even though it has long since been retired.
This is an interesting project that Curd Zechmeister is trying to do. He is getting a complete L-1011 avionics system working for a museum.
A digital active control system (ACS) is described which is used
to reduce maneuver and gust loads in the extended-wing L-1011
TriStar, permitting improved aircraft performance with minimal wing
structure changes. Reliability requirements aimed at high system
availability are satisfied by means of a dual-dual, fail operational
system architecture in which each of the two ACS computers
contains two digital processors. The digital computer provides for
control of the aileron servos, self-test capability and redundancy
management. Attention is given the compatibility of automatic and
primary flight control systems, the digital sensor data transfer
functions of the ACS computer and its Algol-like software configuration,
redundancy management, and servo and computer monitoring.
Pitch Active Control System
This was a concept studied for incorporation onto the L-1011 but never made the cut. Here is an interesting paper by Walt Davis et al on the subject.
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